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MCQ - Mechanical TNPSC JTO
JTO - 534 - Advanced Computer Numerical Control - 534 - Unit VI VMC Machines

76)   

The ATC (Automatic Tool Changer) holds the tools using:

A.
B.
C.
D.
Answer: C
77)   

The gripping length of tool inside the collet must be:

A.
B.
C.
D.
Answer: C
78)   

Tool runout due to poor tool holding can cause:

A.
B.
C.
D.
Answer: C
79)   

What is a shrink fit holder?

A.
B.
C.
D.
Answer: C
80)   

The BT tool holder differs from CAT tool holder by:

A.
B.
C.
D.
Answer: B
81)   

Can subprograms call other subprograms?

A.
B.
C.
D.
Answer: B
82)   

What happens if a subprogram name is missing (e.g., P code not given in M98)?

A.
B.
C.
D.
Answer: B
83)   

If M98 P3000 L2 is written, how many times will the subprogram O3000 run?

A.
B.
C.
D.
Answer: B
84)   

What is the maximum number of nesting levels generally allowed in most CNC controllers?

A.
B.
C.
D.
Answer: C
85)   

What should be the last command in a subprogram to return control to the main program?

A.
B.
C.
D.
Answer: B
86)   

What is a key feature of multi-tasking machines like Turn-Mill Centres?

A.
B.
C.
D.
Answer: C
87)   

Synchronization of main spindle and sub-spindle is required for:

A.
B.
C.
D.
Answer: B
88)   

Transfer of component from main spindle to sub-spindle occurs through:

A.
B.
C.
D.
Answer: C
89)   

Which control feature is most essential in dual spindle machines?

A.
B.
C.
D.
Answer: B
90)   

Turn-Mill Centres are most beneficial in industries requiring:

A.
B.
C.
D.
Answer: C
91)   

Which of the following is NOT an advantage of using fixtures?

A.
B.
C.
D.
Answer: B
92)   

V-blocks are used to

A.
B.
C.
D.
Answer: C
93)   

What is the difference between a jig and a fixture?

A.
B.
C.
D.
Answer: A
94)   

Why is clamping force important in holding workpieces?

A.
B.
C.
D.
Answer: B
95)   

Which of the following allows angular positioning of the workpiece?

A.
B.
C.
D.
Answer: B
96)   

Which of the following materials is not typically machined on a VMC?

A.
B.
C.
D.
Answer: D
97)   

What is a common cause of tool breakage in VMC?

A.
B.
C.
D.
Answer: C
98)   

Which axis is typically used to rotate the table in a 4-axis VMC?

A.
B.
C.
D.
Answer: A
99)   

G90 command in CNC is used for:

A.
B.
C.
D.
Answer: B
100)   

Which CNC command is used to dwell or pause the spindle?

A.
B.
C.
D.
Answer: A